Printer s locking-quoin



(No Model.) 7

J. N. 0. HANKINSON. PRINTERS LOGKING QUOIN.

No. 326,428. Patented Sept. 15, 188 5.

Ill/VE/VTQH I fiizmdfd fimiawm B Afforney WITNESSES UNITED STATES PATENT EE cE.

JOHN N. O. HANKINSON, OF HARRISBURG, PENNSYLVANIA.

PRINTERS LOCK ING-QUOIN.

TJPICIFICATION forming part of Letters Patent No. 326,428, dated September 15, 1885.

I Application filed May 20, 1884. (No model.)

To t wit-urn, it ml/a7) concern:

Be it known that I, JOHN N. O. HANKIN soN, a citizen of the United States, residing at Harrisburg, in the county of Dauphin and State of Pennsylvania, have invented certain new and useful Improvements in Printers Locking-Quoins; and I do hereby declare that the following is a full, clear, and accurate description of my invention, which will enable others to make and use it.

In said drawings, Figure 1 represents a perspective View ofniy major quoin having double rack on its incline and groove. Fig. 2 represents a perspective view of my minor or bar quoin. Fig. 3 represents a top view of my quoins applied to each other. Fig. 4 represents a view of locking-pin. Fig. 5 represents across-section of my quoins taken at the indicated line 00 a, Fig. 3, with locking-pin inserted. Fig. 6 represents a perspective view of my key.

In the description and drawings similar letters denote similar parts of my device.

The object of my present invention is to further carry out and apply the main feature of my positively-locking quoins, for which my application for patent was filed onv March 8, 1884; and the object in both applications is to provide quoins which can be securely locked in position, whether sla'ckly or tightly driven to place upon each other.

My present invention aims to adapt the quoins to keep evenly sustained or poised against canting while being driven by a flat key-bit, and to provide the major quoin with strong teeth set in line transversely with each other in two racks separated only by vacant space, that the said key-bit may engage both racks alike, while the opposite edge of said bit is supported in turning or wrenching at the wall of tubular segment on opposite quoin; also,to provide by the form of the minor quoin, that ready access may be had for inserting the locking-pin between the quoins, and that it may be readily extracted.

The novel and useful features of my invention are, first, a major quoin having two sets of teeth on its incline or inner face, and a way between said teeth or racks, in combination with a minor quoin having itsinclined part narrowed to a middle guiding ledge or tenon adapted to tit said way in the opposite quoin, and notched to admit a locking-pin through the notches and between the teeth of said racks second,wider hearings on the minor quoin for guiding thereon the opposite quoin, in combination with said narrowed part or tenon entered in groove or way through the teeth of said opposite quoin, that the quoins may neither cant nor climb off each other while being wrenched or driven to tighten up the form in the furniture; third, providing the minor quoin with a transversely arranged tubular segment in its butt adapted to admit bit of flat key quite through the quoin, and between teeth of both-racks on the opposite quoin for securing the even action of key.

The exterior surfaces of my quoins are equal parallel planes, and their meeting or interior bearings are equally inclined to said planes, and provided with means for securing them guided upon each other.

Letters A A denote two .sets of teeth or racks projected from the incline or inner face of the major quoin A", so named because it is heavier than the mate quoinD. Said teeth are made strong to serve as catches by which the flat bit K of key K may take secure hold when rotated or worked in the tubular segment H in minor quoin D. Said teeth and segment are adapted to evenly sustain the said key upon both edges of quoins, that the latter may not be canted inadvertently. Said teeth are spaced from each other laterally or at their ends, thus forming the way 13 longitudinally through the incline between said racks, and of width to snugly admit therein tenon O of opposite quoin, and thereby guide the quoins laterally upon each other, and leave the space 0 between ledge D and racks A A open or accessible to insert the locking-pin din the transverse notches a a in said tenon O,and between said teeth, as shown. Said notches and pin are added to secure the quoins looked upon each other longitudinally when driven to any extent desired. Said notches are so spaced in relation to said teeth that while one notch appears in the interstices of the teeth the other is covered by the next pair of teeth, so that the quoins may be locked after minute advances.

To keep the quoins evenly poised upon each 0th er,the abutting surfaces G G are formed on quoin D at its butt,arranged in such proximity to the crowns of the teeth A A that they may rest on said surfaces when the quoins are applied to each other, as shown in Fig. 3.

The keyKhas on it the boss K to limit the insertion of the bit K thereon, and to set on the sides of'the quoins to assist while rotating to keep its axis at right angles to said sides, thus securing a square purchase on the driven parts, and avoiding canting of the quoins.

I am aware that pinions have heretofore been used for moving the quoins gearing in offset racks, and in cut-away margins of the incline, and such I do not claim, broadly.

I obtain a square purchase for the lockingpin (1 by the arrangement of the notches a a next the base-line of the teeth A A, against which teeth the pin bears oppositely at the same time when inserted in either of said notches.

I disclaim as part of this application all reference in it to the instrument termed a key the means for moving the quoins upon each other in the operation oflocking up the form in the furniture, and of unlocking the same said instrument being the subject-matter of a distinct application for patent numbered 167,885, and filed June 6, 1885.

I claim- 1. The combination of the major quoin A, 30 provided on its incline with the racks or two sets of teeth,A A,with way B between them, of the same depth, with the minor quoin D,of full base or part to set against the furniture, and of diminished body oppositely, having 5 thereon centrally the wedge-form tenon C, of equal incline on its edge with that of major quoin and notched at a a, that when inserted in said way and driven home on the furniture a pin, d, inserted in one of said notches and 0 between the teeth of said racks, secures the quoins locked, substantially as and for the purposes set forth.

2. The combination of the two quoins A I), provided on their meeting surfaces with the similarly-inclined way B, and tenon or traveler C, respectively, the latter guided by the teeth A A to keep in said way, and guidingsurfaces G G, parallel with and in range with the crowns of said teeth on the opposite quoin, that said quoins may sustain each other parallel in the furniture, substantially as set forth.

JOHN N. O. HANKINSON.

Attest:

J os. O. BRADY, D. O. MAURER. 

